Multi-ply web forming apparatus with edge aligning means



MULTI-PLY WEB FORMING APPARATUS WITH EDGE ALIGNING MEANS Filed Dec. 14.1960 Oct. 13, 1964 R. A. SHERMAN ETAL 4 Sheets-Sheet l INVENTORS RobertA. Sherman Lawrence H.

Roberrs Oct. 13, 1964 3,152,941

MULTIPLY WEB FORMING APPARATUS WITH EDGE ALIGNING MEANS Filed Dec. 14,1960 R. A. SHERMAN ETA].

4 Sheets-Sheet 2 INVENTORS Roberi A. Sherman Lawrence H. Roberrs i/MATTORNEY Oct. 13, 1964 R. A. SHERMAN ETAL 3,152,941

MULTI-PLY WEB FORMING APPARATUS WITH EDGE ALIGNING MEANS Filed Dec. 14,1960 4 Sheets-Sheet 3 INVENTORS Roberr A.Sherman Lawrence H. Roberrs MZTTQRNEY Oct. 13,1964 R. A. SHERMAN ETAL 3,152,941

MULTI-PLY was FORMING APPARATUS WITH EDGE ALIGNING MEANS Filed Dec. 14,1960 4 Sheets-Sheet 4 FIG. 1C

INVENTORS Roberf A.Sherman Lawrence H. Roberfs WM ATTORNEY tion ofUnited States Patent 3,152,941 MULTI-PLY WEB FORMING APPARATUS WITH EDGEALIGNING BEANS Robert A. Sherman, Lancaster, Pa, and Lawrence H.

Roberts, Clifton, N.J., assignors, by mesne assignments, I

to Corrugating Technicians, Inc., Tenafly, N.J., a corporation of NewJersey Filed Dec. 14, 1960, Ser. No. 75,861 9 Claims. (Cl. 156351)sheet, known as the medium, is fed from a supply roll between two heatedmetal rolls having fluted surfaces which corrugate the medium. While themedium is maintained in contact with one of the corrugating rolls, it isglued to a second flat sheet called the first liner.

The gluing is performed under high heat and great pressure by means of asmooth surface roll pressing the first liner against the corrugatedmedium engaged with the one corrugating roll. The product at this stageis known as a sheet of single face corrugated paperboard.

In the next step of the operation, a sheet of paper called the secondliner is glued to the opposite face of the medium. This is effected byapplying glue to a surface of the single face and then passing thecombined single face and second liner over one or more highly heatedmetal plates against which the two liners and the medium are pressed bya series of metal rolls. The durathe pressure heat application is variedin accordance with the weight (thickness) of the paper sheets and isregulated by varying the rate of movement of the sheets over the hotplates. a

The corrugated board'is purposely made oversize in width to allowsubsequent edge trimming to provide smooth even edges, as the boardemerging. from the machine, and before trimming, does not have suchsmooth 7 even edges. The trimmed board may then be slit to nar-' rowerwidths, if desired, and cut into desired lengths.

If at least one edge of each sheet could be kept in perfect alignmentwith the corresponding edges of the other sheets during the gluingoperations, the resulting corrugatedpaperboard emerging fromthe finalgluing and heating operationwould haveat least one smooth even edge.Thus, only one edge, at the most, would have to be trimmed. This wouldnot only cut down the percentage -of scrap but would also substantiallyreduce the slight crushing of the board attendant upon the trimmingsteps. This tendency of the cutting or trimming opera-. [tions to breakdown the corrugations gives the board a weakened appearance.

Another reason why such continuous monitoring of the sheet edges isimportant is that various papers have different amounts of shrinkagewhen-subjected to high temperatures and pressures. It is not possible todetermine this shrinkage in advance, so that, even with papershavingexactly the same width initially, misalignment of edgesv mayoccur; due to variable shrinkage-when the "paper-is subjected to thehigh temperatures" and pressures,- such as the 280 to 350 F. used in thegluing step, a

during combining of the sheets into corrugated bo ard. In U.SL PatentNo; 2,941,572,'issued June 21,1960,

there is shown and described ed'ge aligning means'including edge sensingmeans operating through a mech'ani: cal linkage type of serve andfollow-up mechanism to maintain the corresponding edges of, the sheetsin accurate alignment with each other. While this apparatus operatessatisfactorily in practice, it has been found that 3,152,941 PatentedOct. 13, 1964 there is some undesirable play in the mechanical linkage,for which is difiicult to fully correct or to compensate. Also,adjustment of the trimming means, to compensate for any errors ininitial setting, is diflicult during operation of the apparatus.

The present invention is directed to improvements in the general type ofedge aligning mechanism shown and described in the mentioned Densen etal. patent. More particularly, a novel type of hydraulically operatedservo and followup mechanism is used, including roller supportingbridges which may be shifted bodily laterally of the paper webs toeffect edge alignment.

The servo and follow up mechanism is under the control of vacuumoperated pilot valves which shift position with changes in the degree ofvacuum. The degree of vacuum on each valve is controlled by a movableedge sensing element in contact with a sheet edge. In addition, certainof theservo mechanism are hydraulically interlocked for conjointoperation on longitudinally spaced portions of the web. I

A novel feature is the web slitting arrangement which is mounted on abridge which is bodily shiftable laterally of the completed web.Thereby, after the knives have been adjusted spatially for the desiredslit widths, the entire slitter may be shifted to properly andconjointly adjust all the knives relative to the edge of the web. In

addition the slitter includes three or more knife supports selectivelymovable into operative relation with the web. The then inoperative setsof knives can be adjusted as to slit width before being moved to the webslitting position. For an understanding of the invention principles,reference is made to the following description of a typical embodimentthereof as illustrated in the accompanying drawing.

In the drawings:

FIG. 1 is a somewhat schematic perspective view of apparatus embodyingthe invention;

FIG. 2 is a partial enlarged perspective view of one of the edge sensingmechanisms; and

FIGS. 1A, 1B and 1C are enlarged schematic per-spective views of theapparatus embodying the invention as shown in FIG. 1, representing theleft, middle and right portions respectively of the schematicperspective view shown in FIG. 1.

In the drawing, electrical connections are illustrated by broken, ordash lines, vacuum lines by dot and dash lines, and hydraulic lines bysolid Referring t9 the drawing a firstjweb 10, known as the medium anddesigned to' bie corrugated, is drawn path as set by the micro-switches.

Web 10 passes over idler roll 14A and under idler roll 14B whichmaintains web 10 firmly engagedwith a steering roll 15. Steering rolls14B and 15 are shiftablelaterally, by means described hereinafter, withroll 15 further being pivotal about a vertical axle 16 to which it isconnected by a radius arm 17. Leaving steering roll 15, web 10 passesunder-and over, respectively, idler rolls 18A .-and,18B.an d thenbetween corrugating rolls 25, ZS which are longitudinally tinted toimpart corrugations to theme dium 10. Rolls. 25,- 25 heat .Web 10 tofiom 280-F. to' 350 F. while, at the same time, imparting a highpressure thereto. Thisrelatively high heating and pressure fixes or setsthe corrugations in medium 10. Beyond corrugating rolls 25, 25, a glueroller 26 applies glue to the corrugations of medium 10. .7 i i V At thesame time, a second paper web 20, known as the first liner, is drawnfrom a roll 21 adjustable laterally or axially by means powered byreversible electric motor 22 controlled by adjustably positionablemicroswitches 23 operatively associated with the edges of first liner 20to maintain this web aligned along a predetermined path as it is drawnfrom roll 21. Web 20 passes over idler roll 24A, under idler roll 24B,and then around pressure roll 27 which presses first liner 20 againstthe I make either a single faceweb or a double face web. To

make a double face web, the single face web 35 is drawn over idler rolls28A and 28B, and then around idler rolls 41 of a single face bridgeguide 4t? which is bodily shiftable laterally of the web. Bridge 40 maybe provided with a second set of wrap-around idler rolls 42, useablealternatively with respect to wrap-around idler rolls 41. From bridge40, the single face web 35 passes under an idler roll 43- engaging thefirst liner 20 surface of the single face Web. The single face linerthen passes between a glue roll 44, fed by a roll 46, and a pressureroll 47. Roll 44 applies glue to the flutes of the corrugated medium 10.

At the same time,.a paper web 30, known as the second liner, is drawnfrom a roll 31 which is bodily shiftable laterally of the web bymechanism driven by a reversible electric motor 32 controlled bymicroswitches 33 operatively associated with the edges of second liner30. Second liner 30 is then drawn under idler rollers 34 and 36A, andover idler roller 363 which presses it against the glue coated flutes ofmedium forming part of single face web 35. The three webs 10, 20 and 30are then drawn between plates 58 and pressure rolls 59, which press web30 into firmly adher'ingrelation with medium 10 to form the double faceweb 45. g

' As stated, if the corresponding edges of the three webs are notaccurately aligned, material must be trimmed from both edges of doubleface web 45 to form smooth even edges on the corrugated board. This notonly wastes material but may also result in slight crushing andweakciated regulator R which is a pilot'valve whose position iscontrolled by the effective vacuum thereon. The vacuum is effected by anexhausting device 57. A motordriven pump 58 supplies hydraulic fluidfrom a reservoir 59 to each valve R, and each valve R is connected by apair of hydraulic lines H to the associated fluid pressure actuator oractuators F. Depending upon the position of valve R, as determined bythe effective vacuum thereon, the valve will allow hydraulic fluid underpressure to flow from pump 58 through one line and return to reservoir59 through the other line. 1

Edge feeler 51-1 of sensing device S-1 contacts the control edge of webor first liner 20 just downstream of roll 24B. Any lateral movement ofweb 20 will vary the opening of the vacuum aperture in element'50-1, andshift valve R-l accordingly. A hydraulic line H-ll connects valve R-llto the inner end of fluid pressure actuator F-l, and a hydraulic lineH-IZ connects valve R-l to the outer end of actuator F-Z. The outer endof actuator F-l is connected to theinner end of actuator F-Z by ahydraulic line H-13 which is always filled solidly with hydraulic fluid.f

Thus, depending upon the direction of lateral shifting of web 20,hydraulic fluid is applied either to actuator F-l or actuator F-Z. Ifactuator F-l isshifted, actuator F-2 is correspondingly shifted throughthe medium of line H-l3, and vice versa. Sensing device S2 moves withactuator F-2. Consequently, anyshifting of web 20 results incorresponding shifting of element 502 and edge feeler 51-2 of sensingdevice S-2. This results in shifting of valve R-Z due to variation inits effective vacuum.

. Hydraulic lines H-21 and H-22 connect valve R-Z to opposite ends ofactuator FA, so that actuator FA is of web 20. The movement; continuesuntil valve R-1 is ening of the medium 10 as illustrated in FIG. 4'ofthe Densen et al. patent. The weakened appearance of the crushed boardmaterially detracts from its sales appeal.

To maintain corresponding edges of the three webs, hereinafter. referredto as the control or near edges of the three webs, in accuratealignment, the apparatus in-.

Y illustrated as controlling the relative aperture of the vacuum line44. In the present arrangement, anelement operated by the finger 51controls the relative sizejof such aperture. Also, each regulator R maybe substantially the same asthe'regulator R shown in FIG. 5 of saidDensen et al. patent except that the diaphragm 45 controls a valve whichvaries the relative amount of fluid flowing through a pair of fluidlines. 1 In other words, each regulator R comprises a diaphragm operatedpilot valve, such as are well known to those skilled in the As best seenin FIG. 2,'-element.5tl is mounted, by means of an arm schematicallyindicated at 52, on a block 53 which is adjustable along a calibratedshaft 55 by'means of a threaded shaft 54 operated 'bya control handle56.

A vacuum line V connects each element F to the. assorestored to itsneutral position, which occurs when the control edge of web 20 isrestored to its preet position.

To effect exact alignment of the control edges of webs 1i) and 20,elements 504 and -2 are adjusted to the same position or reading ontheir respective calibrated shafts before the apparatus is started. Itwill be noted that sensing device 3-2 is operative on single face web 35in advance of idler roll 28A.

Single face web 35 and web 30 have their control edges maintainedexactly aligned in the same manner as described; Sensing device S3 isassociated with web 35 just beyond bridge 40, and sensing device 8-4 isassociated with web 30 just beyond idler roll 34. However, in this case,in place of a moving steering roller 15, actuator FB shifts bridge 40laterally.

. A feature of the invention is the slitter having the slitter knivesadjustable as to number and lateral spacing. Between sensing devicesS3,S-4 andthe slitter 60, the double face web 45 can weave or shiftlaterally even though allthree control edges of the webs 10, 20, 30 areexactly aligned. .Thus, the cutting or slitting rollers must becorrespondingly shifted so as to main their exact positions relative tothe control edges. V

' The slitter 60 comprises a pair of essentially triangu- Theseplatessupport three calibrated graduated-shafts extending across the web, oneshaft being at each corner of the triangles. The knives 65 areadjustable axially of these shafts, by having hubs provided with setscrews. Only one shaft is in operative relation with the web at anytime, so that the knives may be set and adjusted on the other shafts fora change in cutting or slitting pattern. The. slitter is mounted onrollers 63, for bodily lateralshifting by'actuator FC.

An edge sensing device S-S engages web 45 between the pressure means 58,59 and slitter 60'. Any shifting of edge feeler 51-5, due to shifting ofweb 45, results in aoperation ofvalve R-S connected by lines -H-51 .andH-SZto actuator FC. "The latter is thus operated to lateral shift of web45. It should be noted that the far knife 65 is an edge trimmer for thefar or uncontrolled edge of the board. A rotary knife may be provided atthe control edge to function in the event of failure of sensingmechanism S-5. v

The hydraulic actuating system with the vacuum controls is much morereadily adaptable to any corrugated board making machine than is amechanical type of edge aligning mechanism. "As one example, it is muchless simple and expensive to run the hydraulic lines than to positionand accurately set mechanical linkage. Furthermore, the play, which cannever be completely eliminated from relatively movable mechanical parts,is not present in hydraulic servo and fol-low up mechanism. Thus, thecontrol is much more sensitive and accurate.

Microswitches 13, 23 and 33 are provided to assure rolls 11, 21 and 31being positioned within the control range of the edge aligningmechanism. These switches are set'vvith a positional relation to thesize of the rolls. If a new roll is fed into the machine in a positionoutside such control range, the microswitches operate motors 12,

22 or 24 to adjust the roll to aposition within the control range.

While a specific embodiment of the invention has been shown anddescribed in detail to illustrate the application of the inventionprinciples, it will be understood that the invention may be embodiedotherwise without departing from such principles.

What is claimed is:

1. In apparatus for uniting paper webs in superposed relation to formmulti-ply paper strip, and of the type including means for progressivelywithdrawing a first liner web from a supply, means for progressivelywithdrawing a medium web from a supply, means for progressively applyingadhesive to a surface of the mediumweb, and means for progressivelypressing the liner web against the adhesive coated surface of the mediumweb to form a two-ply strip: the improvement comprising edge aligningmeans including a first support extending laterally of said first linerweb; a first edge detector engaged with a control edge of the firstliner web and mounted on said first support for adjustment laterally ofsaid first liner web; said first edge detector being movable from aneutral position responsive to lateral shifting of said first liner webfrom a predetermined path; a first hydraulic fluid actuator operable toshift said first support laterally of said first liner web; a secondsupport extending laterally of said strip; a second edge detectorengaged with a control edge of said strip corresponding to the controledge of said first liner web and mounted on said second support foradjustment laterally of said strip; said second edge detector beingmovable from a neutral position responsive to lateral shifting of saidstrip from a predetermined path; a second hydraulic fluid actuatoroperable to shift said second support laterally of said strip; a sourceof hydraulic fluid under pressure; a first regulator connected to saidfirst edge detector and between said source of hydraulic fluid and oneend of said first actuator and the opposite end of said second actuator,

'and selectively operable to supply fluid "to one of said actuators,upon movement of said first edge detector from its neutral position, toshift the associated support in a direction opposite to the direction ofshift of said first liner web; a continuous hydraulic fluid filled line,uninterrupted by valves or branches, connecting the opposite'end of saidfirst actuator to the one end of said second actuator, said line beingcontinuously solidly filled with hydraulic fluid whereby, upon operationof either actuator, the other actuator is operated correspondingly as todirection'and degree; lateral guiding means engaging the medium web inadvance of the adhesive applying means; a third hydraulic fluid actuatorconnected to said guiding means to actuate the latter to shift themedium Web laterally; and a second regulator connected to said secondedge detector and between said source and said third actuator andoperable, upon movement of said second detector from its neutralposition due to shifting of said second support, to supply fluid to saidthird actuator in a direction to operate the latter to actuate saidguiding means to shift the medium web laterally in direction and degreecorresponding to the shift of the first liner web.

2. Edge aligning means asclaimed in claim 1 in which each supportincludes a graduated shaft extending laterally of the web; each detectorbeing supported on a mount movable along the associated graduated shaft;whereby the lateral positions of the detectors may be coordinated inadvance of starting the forming operation.

3. Edge aligning means as claimed inclaim 1 in which the supplies arerolls of paper; laterally adjustable mounts for each roll; reversibleelectric motor means for laterally shifting each mount; and adjustablypositioned switch means controlling operation of the associated motormeans and operable by a roll, when the latter is positioned in amountlaterally beyond the control range of the edge aligning means, toenergize the associated motor means to shift its controlled mountlaterally to position the roll within such control range.

4. Edge aligning means as claimed in claim 1 in which said guiding meansis a steering roller;

5. Edge aligning means as claimed in claim 1 in which said apparatusincludes means for progressively withdrawing a second liner web from asupply, means for progressively applying adhesive to the exposed surfaceof the medium web of said strip, and means for progressively pressingthe second liner web against the adhesive coated exposed surface of themedium web to form a three-ply strip: a laterally shifitable bridge;roller means on said bridge engaged by said two-ply strip; a thirdsupport extending laterally of said strip beyond said bridge; a thirdedge detector engaged with said control edge of the strip and mounted onsaid third support for adjustment laterally of said strip; said thirddetector being movable from a neutral position responsive tolateralshifting of said strip; a'fourth hydraulic fluid actuator operable toshift said third support laterally of said strip; a fourth supportextending laterally of said second liner web in advance of said lastnamed pressing means; a fourth edge detector engaged with a control edgeof said second liner web corresponding to said first-named controledges; and mounted on said fourth support for adjustment laterally ofthe second liner web; said fourth detector being movable from a neutralposition responsive to lateral shifting of said second liner web; afifth hydraulic fluid actuator operable to shift said fourth supportlaterally of said second liner web; a third regulator connected to saidfourth edge detector and between said source and one end of said fourthactuator and the opposite end of said fifth actuator; and selectivelyoperable to supply fluid to one of said fourth and fifth actuators, uponmovement of said fourth edge detector from its neutral position, toshift the associated support in a direction opposite to the direction ofshift of said second liner web; a continuous hydraulic fluid filledline, uninterrupted by valves or branches, connecting the opposite endof said fourth actuator to the one endtofsaid fifth actuator, said linebeing continuously solidly filled with hydraulic fluid whereby uponoperation of either actuator, the other actuator'is operatedcorrespondingly as to direction and degree;a sixth hydraulic fluidactuator connected to said bridge to actuate the latter .to shift saidtwoply strip laterally; and a fourth regulator connected to said thirdedge detector and between said source and said sixth actuator andoperable, upon movement of said third detector from its neutral positiondue to shifting of said third support, to supply fluid to said sixthactuator in a direction to operate the latter to actuate bridge to shiftthe,

. 7 6. In apparatus for uniting paper webs in superposed relation toformmulti-ply paper strip, of the type including means for maintainingcorresponding control edges of the WBbSlIl lateral alignment duringformation of the v multi-ply paper strip; means for laterallysub-dividing the strip and trimming the uncontrolled edge thereofcomprising, in combination, a knife support extending across the strip;knives adjustable longitudinally of said support, in accordance withpre-set slit widths of the strip, and including a knife for trimming theuncontrolled edge of the strip; a bridge extending transversely of thestrip and mounting said knife support; an actuator effective to shiftsaid bridge laterally of the strip; an edge detector support movablewith said bridge; an edge detector adjustable along said detectorsupport and operatively associated with the controlled edge of the stripin advance of said knife support, and movable from a neutral positionupon lateral shifting of the strip; and servo-mechanism interconnectingsaid detector and said actuator and operable, upon shifting of said edgedetector from a neutral position, to control said actuator to shift saidbridge laterally in direction and degree corresponding to the lateralshifting of the strip.

7. Means as claimed in claim6 including a pair of plates rotatablymounted .on said bridge on either side of the strip; and plural knifesupports extending between said plates and selectively positionableinoperative relation to the strip, one at a time, by rotation of saidplates.

8. Means as claimed in claim 6 including a knife on said knife supportengageable'with such controlled edge to trim the same upon failure ofsaid edge detector or said servo-mechanism.

9. Means as claimed in claim 6 in which said actuator is a hydraulicfluid actuator.

Q References Cited in the file of this patent UNITED STATES PATENTS2,412,576 Giles Dec. 17, 1946 2,914,957 Johnson Dec. 1, 1959 2,941,572Densen et all June 21, 1960 UNITED STATES PATENT OFFICE CERTIFICATE OFCORRECTION Patent No. 3,152, 941 October 13, 1964 Robert A. Sherman etal It is hereby certified that error appears in the above numbered.patent requiring correction and that the said Letters Patent shouldread as corrected below Column 4, lines 43 and 44, strike out "notedthat sensing device S-Z is operative on single face web 35 in advance ofidler roll 28A." and insert instead noted that sensing device 5-2 isoperative on web 10 in advance of corrugating roll 25 (FIG. 1A) column5, lines 49, 50, 53, 54 and 57, for "strip", each occurrence, readmedium web Signed and sealed this 6th day of July 1965.

(SEAL) Attest:

ERNEST W. SWIDER EDWARD J. BRENNER Aitesting Officer Commissioner ofPatents

1. IN APPARATUS FOR UNITING PAPER WEBS IN SUPERPOSED RELATION TO FORMMULTI-PLY PAPER STRIP, AND OF THE TYPE INCLUDING MEANS FOR PORGRESSIVELYWITHDRAWING A FIRST LINER WEB FROM A SUPPLY, MEANS FOR PROGRESSIVELYWITHDRAWING A MEDIUM WEB FROM A SUPPLY, MEANS FOR PROGRESSIVELY APPLYINGADHESIVE TO A SURFACE OF THE MEDIUM WEB, AND MEANS FOR PROGRESSIVELYPRESSING THE LINER WEB AGAINST THE ADHESIVE COATED SURFACE OF THE MEDIUMWEB TO FORM A TWO-PLY STRIP; THE IMPROVEMENT COMPRISING EDGE ALIGNINGMEANS INCLUDING A FIRST SUPPORT EXTENDING LATERALLY OF SAID FIRST LINERWEB; A FIRST EDGE DETECTOR ENGAGED WITH A CONTROL EDGE OF THE FIRSTLINER WEB AND MOUNTED ON SAID FIRST SUPPORT FOR ADJUSTMENT LATERALLY OFSAID FIRST LINER WEB; SAID FIRST EDGE DETECTOR BEING MOVABLE FROM ANEUTRAL POSITION RESPONSIVE TO LATERAL SHAIFTING OF SAID FIRST LINER WEBFROM A PREDETERMINED PATH; A FIRST HYDRAULIC FLUID ACUTATOR OPERABLE TOSHIFT SAID FIRST SUPPORT LATERALLY OF SAID FIRST LINER WEB; A SECONDSUPPORT EXTENDING LATERALLY OF SAID STRIP; A SECOND EDGE DETECTORENGAGED WITH A CONTROL EDGE OF SAID STRIP CORRESPONDING TO THE CONTROLEDGE OF SAID FIRST LINER WEB AND MOUNTED ON SAID SECOND SUPPORT FORADJUSTMENT LATERALLY OF SAID STRIP; SAID SECOND EDGE DETECTOR BEINGMOVALBE FROM A NEUTRAL POSITION RESPONSIVE TO LATERAL SHIFTING OF SAIDSTRIP FROM A PREDETERMINED PATH; A SECOND HYDRAULIC FLUID ACTUATOROPERABLE TO SHIFT SAID SECOND SUPPORT LATERALLY OF SAID STRIP; A SOURCEOF HYDRAULIC FLUID UNDER PRESSURE; A FIRST REGULATOR CONNECTED TO SAIDFIRST EDGE DETECTOR AND BETWEEN SAID SOURCE OF HYDRAULIC FLUID AND ONEEND OF SAID FIRST ACTUATOR AND THE OPPOSITE END OF SAID SECOND ACTUATOR,AND SELECTIVELY OPERABLE TO SUPPLY FLUID TO ONE OF SAID ACTUATORS, UPONMOVEMENT OF SAID FIRST EDGE DETECTOR FROM ITS NEUTRAL POSITION, TO SHFITTHE ASSOCIATED SUPPORT IN A DIRECTION OPPOSITE TO THE DIRCTION OF SHIFTOF SAID FIRST LINER WEB; A CONTINUOUS HYDRAULIC FLUID FILLED LINE,UNINTERRUPTED BY VALVES OR BRANCHES, CONNECTING THE OPPOSITE END OF SAIDFIRST ACTUATOR TO THE ONE END OF SAID SECOND CTUATOR, SAID LINE BEINGCONTINUOUSLY SOLIDLY FILLED WITH HYDRAULIC FLUID WHEREBY, UPON OPERATIONOF EITHER ACTUATOR, THE OTHER ACTUATOR IS OPERATED CORRESPONDINGLY AS TODIRECTION AND DEGREE; LATERAL GUIDING MEANS ENGAGING THE MEDIUM WEB INADVANCE OF THE ADHESIVE APPLYING MEANS; A THIRD HYDRAULIC FLUID ACTUATORCONNECTED TO SAID GUIDING MEANS TO ACTUATE THE LATTER TO SHFIT THEMEDIUM WEB LATERALLY; AND A SECOND REGULATOR CONNECTED TO SAID SECONDEDGE DETECTOR AND BETWEEN SAID SOURCE AND SAID THIRD ACTUATOR ANDOPERABLE, UPON MOVEMENT OF SAID SECOND DETECTOR FROM ITS NEUTRALPOSITION DUE TO SHIFTING OF SAID SECONDSUPPORT, TO SUPPLY FLUID TO SAIDTHIRD ACTUATOR IN A DIRECTION TO OPERATE THE LATTER TO ACTUATE SAIDGUIDING MEANS TO SHIFT THE MEDIUM WEB LATERALLY IN DIRECTION AND DEGREECORRESPONDING TO THE SHIFT OF THE FIRST LINER WEB.